Taxon Details
Plagiobothrys diffusus
San Francisco popcornflower
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Taxon Summary:
Plagiobothrys diffusus, commonly known as San Francisco popcornflower, is a annual herb in the Boraginaceae that is found only in California. It occurs within Coastal prairie, and Valley and foothill grassland, growing at elevations from 60 to 360 meters. Plagiobothrys diffusus is ranked 1B.1, Plants Rare, Threatened or Endangered in California and Elsewhere; Seriously threatened in California.|
Scientific Name: Plagiobothrys diffusus (Greene) Jtn. |
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Common Name: San Francisco popcornflower |
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| Family: | Boraginaceae | |
| Element Code: | PDBOR0V080 | |
| USDA Plants Symbol: | ||
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Synonyms/Other Names: |
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| Name Status: |
JEF, FNA, POWO, IPNI, Tropicos |
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| CA Rare Plant Rank: | 1B.1 |
| Fed List: | None |
| State List: | CE (1979-09-01) |
| Global Rank: | G1Q |
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State Rank: |
S1 |
| Other Status: | SB_UCSC |
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CRPR Changes: |
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| Add Date: | 1974-01-01 |
| Date Edited: | 2021-05-26 |
| Lifeform: annual herb | ||||||||||||||
Blooming Period: Mar-Jun
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Elevation:
60 - 360 meters 195 - 1180 feet |
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General Habitats:
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| Microhabitat Details: | ||||||||||||||
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Microhabitat:
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Notes: Threatened by development and non-native plants. Possibly threatened by grazing and vehicles. Identification difficult; taxonomic work needed. See P. reticulatus var. rossianorum in The Jepson Manual. See Pittonia 1:14 (1887) for original description, and Contributions from the Arnold Arboretum 3:77 (1932) for revised nomenclature. |
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Threats: |
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Taxonomy: |
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| Threat List Total: | 12 | |
| Total EOs | % of EOs | |
| EOs with Threat Listed: | 16 | 94 % |
| THREAT LIST: | ||
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| Non-native plant impacts | 10 | 58% |
| Development | 9 | 52% |
| Other | 6 | 35% |
| Grazing | 5 | 29% |
| Recreational use (non-ORV) | 3 | 17% |
| Road/trail construction/maint. | 2 | 11% |
| Wood cutting or brush clearing | 2 | 11% |
| ORV activity | 2 | 11% |
| Improper burning regime | 1 | 5% |
| Erosion/runoff | 1 | 5% |
| Altered flood/tidal/hydrologic regime | 1 | 5% |
| Biocides | 1 | 5% |
| Total Occurrences: | 17 | ||||
| Element Occurrence Ranks: | |||||
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| A | B | C | D | X | U |
| 2 | 5 | 6 | 1 | 1 | 2 |
| Occurrence Status: | |||||
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| Historical >20 Years | 9 | ||||
| Recent <=20 Years | 8 | ||||
| Presence: | |||||
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| Presumed Extant | 16 | ||||
| Possibly Extirpated | 0 | ||||
| Presumed Extirpated | 1 | ||||
| California Endemic: | |||||||||||||
| California Island: | |||||||||||||
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States: Name (Code) California (CA) |
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California Counties and Islands: Name (Code) Alameda (ALA), San Benito (SBT), San Francisco (SFO)*, San Mateo (SMT), Santa Cruz (SCR) |
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Quads: Name (Quad Code) Ano Nuevo (3712213), Davenport (3712212), Felton (3712211), Franklin Point (3712223), Laurel (3712118), Oakland East (3712272), San Francisco North (3712274)*, San Juan Bautista (3612175), Santa Cruz (3612281), Watsonville West (3612187) |
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Notes:
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Presumed Extant
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